Many in the crowd and in the 5th-Avenue parade wore blue-and-white t-shirts the color of the Israeli flag with the message: “No-Han” in support of Mets ace Johan Santana’s no-hitter on Friday night, the first in team history.

In place of the O in “No” an the H in “Han” was a Jewish star.

“A guy was selling them out of the back of his van,” Amir Ledovitz of Crown Heights told The Post. “Everyone was buying them. The Mets are like Israel — an underdog.”

Two marchers said they paid $12 each for the shirts, but the third marcher said he got three for $20.